Classical and quantum entropy of parton distributions
- Author(s): Hagiwara, Y;
- Hatta, Y;
- Xiao, BW;
- Yuan, F
- et al.
Published Web Locationhttps://doi.org/10.1103/PhysRevD.97.094029
We introduce the semiclassical Wehrl entropy for the nucleon as a measure of complexity of the multiparton configuration in phase space. This gives a new perspective on the nucleon tomography. We evaluate the entropy in the small-x region and compare with the quantum von Neumann entropy. We also argue that the growth of entropy at small x is eventually slowed down due to the Pomeron loop effect.